Patents by Inventor Ken-ichi Hiroshima

Ken-ichi Hiroshima has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method for preparing and regenerating a composite crucible
    Patent number: 6808744
    Abstract: A composite crucible for pulling up monocrystalline silicon, which is superior in shape stability and suitable for a large-sized one is provided. The composite crucible is characterized in that a carbonaceous material as an outer layer and a quartz glass as an inner layer are integrally formed. Methods for preparing and regenerating a composite crucible are also disclosed.
    Type: Grant
    Filed: January 28, 2003
    Date of Patent: October 26, 2004
    Assignee: Mitsubishi Material Quartz Corporation
    Inventors: Yoshiyuki Tsuji, Masanori Fukui, Ken-ichi Hiroshima
  • Method for preparing and regenerating a composite crucible
    Publication number: 20030113449
    Abstract: A composite crucible for pulling up monocrystalline silicone, which is superior in shape stability and suitable for a large-sized one is provided. The composite crucible is characterized in that a carbonaceous material as an outer layer and a quartz glass as an inner layer are integrally formed.
    Type: Application
    Filed: January 28, 2003
    Publication date: June 19, 2003
    Inventors: Yoshiyuki Tsuji, Masanori Fukui, Ken-Ichi Hiroshima
  • Composite crucible, and preparation method and regeneration method thereof
    Patent number: 6524668
    Abstract: A composite crucible for pulling up monocrystalline silicone, which is superior in shape stability and suitable for a large-sized one is provided. The composite crucible is characterized in that a carbonaceous material as an outer layer and a quartz glass as an inner layer are integrally formed.
    Type: Grant
    Filed: June 16, 1999
    Date of Patent: February 25, 2003
    Assignee: Mitsubishi Material Quartz Corporation
    Inventors: Yoshiyuki Tsuji, Masanori Fukui, Ken-ichi Hiroshima